Have default mouse and key bindings
Have default mouse and key bindings

This improves the situation where the user has not installed the default
configuration file.

Resolves #42.

alacritty/alacritty,jwilm/alacritty,alacritty/alacritty,jwilm/alacritty,dannydulai/alacritty,dannydulai/alacritty,jwilm/alacritty,jwilm/alacritty